PENSION AND POSTRETIREMENT BENEFIT PLANS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Non-current pension liabilities	$ 1,182		$ 1,182		$ 765
Defined contribution plan expense	50	$ 45	92	$ 89
Pension Benefits [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Service cost - benefits earned during the period	7	6	13	12
Interest cost on projected benefit obligation	49	60	100	121
Expected return on plan assets	(106)	(103)	(210)	(205)
Amortization of prior service credits	(1)	(1)	(2)	(2)
Amortization of net actuarial loss	21	26	40	50
Curtailments and settlements	25	36	47	63
Special termination benefits			1
Net periodic benefit cost/(credit)	(5)	24	(11)	39
Other Benefits [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Service cost - benefits earned during the period	1	1	2	2
Interest cost on projected benefit obligation	2	3	5	6
Expected return on plan assets	(6)	(6)	(12)	(13)
Amortization of prior service credits	(1)	(2)	(2)	(3)
Amortization of net actuarial loss		1		2
Net periodic benefit cost/(credit)	$ (4)	$ (3)	$ (7)	$ (6)